JPS60174633A - Manufacture of frp plate - Google Patents

Abstract

PURPOSE:To constitute the titled method so that productivity is improved and generation of pin holes does not occur, by making use of adhesive force of uncured FRP forming a back up layer for adhesion between a base material and the back up layer and between the back up layer and a corrugated layer. CONSTITUTION:A mold release film 2 such as polyvinyl alcohol is mounted on a base board 7 and a corrugated layer 3 is formed by applying polyester resin to the film. Then a back up layer 4 is formed by mounting FRP with which polyester resin has been impregnated on a base material 5, and a laminated layer part 6 is formed by the semicured corrugated layer 3 during unkneaded state of the back up layer 4. After removal of gas between the corrugated layer 3 and the back layer 4 by pressing the surface of the mold release film 2 by a roll 8, the mold release film 2 is peeled off by making the laminated layer part 6 cure at the room temperature. As high pressure is not necessary for adhesion a large processing equipment is unnecessary and as an adhesive agent is not used applying work of the agent becomes unnecessary and productivity can be improved.

Description

Detailed Description of the Invention (a) Field of the Invention The present invention relates to FRP (Fiberglass Reinfo
The present invention relates to a method of manufacturing a plate.

(b) Conventional technology and its problems Traditionally, it has been widely practiced to provide an FRP layer on the surface of plywood etc. in order to improve its surface properties, but it has been reported that the fiberglass is exposed on the surface and becomes fluffy. There is a problem. Therefore, a Delcoat layer having water resistance and chemical resistance of 1 or more is generally provided on the surface of FRP. As a method for manufacturing an FRP board with a gel coat layer, for example, a release film is coated with a synthetic resin material for del coat, FRP
After sequentially applying and curing to form a laminated material consisting of a gel coat layer and a back-up layer, this laminated material is placed on a base material via an adhesive, and pressed with a press to form a second layer. Next, bonding is performed to integrate the laminated material and the base material.
There is a method of manufacturing RP board. In addition, FR on the surface of the base material
P is coated to form a back-up layer, a gel coat synthetic resin material is coated on the surface of the semi-cured back-up layer to form a del coat layer, and a release film is coated on the surface of this gel coat layer. There is a method of manufacturing an FRP board by sequentially applying pressure with a roll to remove air bubbles in the gel foot layer and the back-up layer, and then curing the gel foot layer and the back-up layer.

However, the former manufacturing method requires adhesive for secondary bonding, requires a large press if the base material is long, and requires a large number of production steps, making production difficult. The disadvantage is that it is time consuming. In addition, the latter manufacturing method has the disadvantage that if sufficient defoaming is not performed, air bubbles will rise to the surface of the gel coat layer and pinholes will easily occur.

(c) Purpose of the Invention The purpose of the present invention is to solve the above-mentioned deficiency, I! The purpose of this invention is to provide a method for manufacturing FRP boards that does not require adhesives or large-scale manufacturing equipment, has excellent productivity, and does not generate pinholes.

(d) Structure of the Invention In order to achieve the above object, the method for manufacturing an F RF' board according to the present invention comprises a step of applying a gel coat synthetic resin material to a release film to form a gel coat layer, and a step of forming a gel coat layer on a release film. a step of forming a back-up layer by disposing uncured FRP on a surface; a step of placing the gel coat layer in at least a semi-cured state on the uncured back-up layer to form a laminated portion; The method consists of a step of degassing the gel coat layer and a back-up layer that make up the laminated portion, and a step of curing the laminated portion.

(E) Description of Embodiments Embodiments according to the present invention will be described below with reference to the accompanying drawings.

The manufacturing method of the FRP board 1 according to the present invention includes gel coat layer formation step A, back-up layer formation step B, laminated portion forming step C, defoaming step, laminated portion curing step E, and mold release. It consists of a film peeling step F.

Gel coat layer forming step A is a step of placing a release film 2 made of polyvinyl alcohol on a flat base 7, and applying a polyester resin material as a synthetic resin material for gel coat to the surface thereof to form a gel coat layer 3. be. The release film 2 is not limited to polyvinyl alcohol (PVA), but materials that are not susceptible to solvents such as styrene such as Tetron (registered trademark) and polyethylene are suitable. In addition, since polyester resin is used as the synthetic resin material for Delcoat, it has excellent water resistance, heat resistance, and chemical resistance of 1 strength, as well as excellent adhesion with the back-up layer described below. Also good. Note that the synthetic resin material for gel coat is not limited to polyester resin material, but may be any other resin material as long as it has the same properties as this polyester resin material.

The back-up layer forming step B is a step of forming the back-up layer 4 by placing FRP in which gelatin mat is impregnated with polyester resin on the surface of the base material 5. Examples of the base material 5 include plywood, wood board, soft fiberboard, medium-density fiberboard, particle board, metal board, and hard foam board. Also,
FRP is not limited to gelatin mat impregnated with a synthetic resin material, but may also be made of glass cloth.

Alternatively, a gelatin mat or glass cloth may be placed on a base material, and then a synthetic resin material may be applied and impregnated therewith.

The laminated portion forming step C is a step of placing the semi-cured Delcoat layer 3 on top of the back-up layer 4 while it is still uncured to form the laminated portion 6. . In this step, the Delcoat layer 3 is not limited to a semi-cured state, but may be in a hardened state.

In particular, the surface layer of the Delcoat layer 3 that is in contact with the release film 2 needs to be hardened to an extent that prevents bubbles from rising. Further, since the delcoat layer 3 is not in an uncured state, there is no problem that styrene oozes out from the resin material of the back-up layer 4 and causes the gelcoat layer 3 to swell.

The defoaming step is a step in which the surface of the release film 2 is sequentially pressurized with a roll 8 to remove gas between the Delcoat layer 3 and the back-up layer 4. Note that the defoaming method is not limited to pressurization using rolls, but may also be a method using a vacuum press.

In addition, according to the manufacturing method according to the present invention, since the gel coat layer 3 is placed on the uncured soft back-up layer 4, both layers can be defoamed with a small pressure.

Can be used for gluing. Therefore, the laminated portion 6 and the base material 5 can be integrated without applying a large pressure, so that large equipment for pressurizing with a large pressure is not required. In addition, even if pressure is applied from the surface of a rigid base material such as plywood to remove air, the Delcoat layer on the surface is in a hardened or semi-hardened state, so air will not rise to the surface of the gelcoat layer1) , the occurrence of pinholes can be prevented. Moreover, at the same time as defoaming, FR
Adhesion between the P layer and the base material is possible.

The laminated portion curing step E and the release film peeling step F are steps in which the laminated portion 6 is cured by being left at room temperature after being pressurized by the roll 8, and then the release film 2 is peeled off. Curing may be accelerated by external heating, and the release film 2 may be peeled off at the construction site to protect the surface of the Delft layer 3.

In addition, in the above-mentioned Example, although the manufacturing process was described individually, it is not necessarily limited to this, and it goes without saying that manufacturing may be performed using a continuous production line.

(F) Effects of the Invention As is clear from the above explanation, according to the method for manufacturing an FRP board according to the present invention, the backup layer is used for adhesion between the base material and the backup layer and between the backup layer and the gel coat layer. Since it utilizes the adhesive strength of the uncured FRP that forms it, no adhesive is required. Moreover, since the uncured soft back-up layer and the at least semi-cured Delcoat layer are degassed and bonded, large pressure is not required to bond the gel coat layer and the back-up layer, so large pressurizing equipment is not required. Not needed. Furthermore, since no adhesive is used, there is no need to apply adhesive, and the number of production steps is reduced, so productivity can be improved. Furthermore, a cured or semi-cured gel coat layer is placed on the back-up layer,
Since it is laminated, air will not float on the surface of Delcoat, which has the effect of preventing pinholes from forming.

[Brief explanation of the drawing]

The figures are explanatory diagrams showing each manufacturing process of an embodiment according to the present invention. DESCRIPTION OF SYMBOLS 1... FRP board, 2... Release film, 3... Delcoat layer, 4... Backup layer, 5... Base material,
6... Laminated portion. 7- Procedural amendment (formula) % formula % 1 Indication of the case Patent Application No. 31986 of 1982 2. Name of the invention Method for manufacturing FRP board 3. Relationship with the person making the amendment case Patent applicant representative Mura Nishi Red No. 34, Agent May 29, 1980 (Delivery date) 6. Subject of amendment (1) Column for simple explanation of drawings in the specification i (2)
1 Drawing, Surface 7, Contents of amendment (1) On page 8, line 15 of the specification, [The drawings are related to the present invention]
. . . Manufacturing process-1 is replaced by ``Figures 1 to 6 are explanatory diagrams showing each manufacturing process of the embodiment according to the present invention, and Figure 1 is a gel coat layer forming process A, Figure 2 shows the back-up layer forming step B, and Figure 3 shows the laminated part forming step C1-4.
The figure shows the degassing process, Figure 5 shows the laminated part curing process E, and Figure 6 shows the release film peeling process F]. (2) We will correct the drawing as shown in the attached sheet. Above 2- IBL district (0 (O II faction)

Claims (1)

[Claims] (1) A process of applying a synthetic resin material for Delcoat to a release film to form a Delcoat layer, a process of disposing uncured FRP on the base material surface to form a back-up layer, and a process of forming a back-up layer by disposing uncured FRP on the base material surface. a step of placing the Delcoat layer in at least a semi-cured state on the back-up layer to form a laminated portion; a step of defoaming gas between the Delcoat layer and the back-up layer constituting the laminated portion; A method for producing an FRP board, comprising the step of curing a laminated portion.